These are the charecters that ARE taken , the ones not taken arent listed.
Earthlings-
Master Roshi
Bulma
Krillin
Yamu
Nameks-
Nail
Piccolo
Androids-
Android #13
Android #16
Android #17
Android #18
Cell
Saiyans-
Goku
Future Trunks
Vegeta
Brolly
Vegeta jr
Gohan
Turles
Bardock
GT Trunks
Goten
Vegeta-Bebi
Majin Vegeta
Vegetto
King Vegeta
Trunks
Toma
Nappa
Celpia
Gotenks
Great Saiyaman
Chibi Goku
Gogeta
Radditz
Others-
Tapion
Kid Buu
Koola
Pikkon
Frieza